OPINION

Carlos D. Mason appeals the revocation of his supervised release and his fourteen-month sentence. Mason argues the district court abused its discretion by finding the evidence sufficient to justify revoking his supervised release term and to impose a term of imprisonment. 1 We affirm.

We review a district court’s revocation of supervised release and its imposi *236 tion of a sentence after revocation for abuse of discretion. United States v. Davis, 53 F.3d 638, 642-43 (4th Cir. 1995). The district court need only find a violation of a condition of supervised release by a preponderance of the evidence. See 18 U.S.C.A. § 3583(e)(3) (West 2000).

On June 27, 2001, the district court conducted a supervised release violation hearing in which Mason pled not guilty to the violations contained in the petition. After hearing evidence presented by the Government and the defense, the court found Mason guilty of both violations and sentenced him to fourteen months’ imprisonment.

Mason’s chief argument on appeal is that there was insufficient evidence of the violation of law he is alleged to have committed, a crack cocaine drug transaction. Even without the district court’s finding that Mason was involved in a drug transaction, however, we conclude the district court did not abuse its discretion in revoking Mason’s supervised release.

During the revocation hearing, Probation Officer Daniel Gertler testified Mason violated condition seven of his terms of supervised release. Condition seven prohibits the purchase, possession, use, distribution, or administration of any narcotic. According to Gertler, Mason failed two urinalysis screening tests in July 1999 and January 2001, when he tested positive for marijuana and PCP. Mason acknowledged using drugs on both occasions to his probation officer, Paul Halleran. 2 Because revocation of supervised release is mandatory if the defendant unlawfully possesses a controlled substance, see 18 U.S.C.A. § 3583(g) (West 1994 & Supp. 1999), Mason’s drug use was sufficient support for the district court to revoke his supervised release term.

For these reasons, we affirm Mason’s conviction and sentence. We dispense with oral argument because the facts and legal contentions are adequately presented in the materials before the court and argument would not aid the decisional process.

AFFIRMED.